all hash rate for now is about 30 MH/sec - 20.5 nanopool, 2 fairhash, 1 spacepools, 1 hashvault and lees others...
but difficulty is 19000137766 - its equals 158.33 MH/sec
why?
because of difficulty adjust 80 blocks and some cheater uses this.
he is mining with approximately 140 MH/sec (some hidden/private pool or solo) about 2-3 hours on low difficulty 80-100 blocks,
then difficulty adjust and he stops...
after that nanopool (20.5 MH/sec) is finding blocks with high diff not 2 min/block, but 15-20 min... for others its hours..
may be difficulty adjust must be less then 80 blocks? 5 - 10 for example?
may be its 250-300 blocks
look at blocks 308036 - 308300
a lot of cases when in 1 minute someone found 3-4 blocks (308091 - 308094)! its about 15-20 sec / block, but it must be 2 min / block
and now this ninja miner with 100 MH/sec doing that again and again... he mine with low diff almost all blocks and then other miners (nano, fairhash, etc) sucks with high diff...